Causes of skin discoloration in dogs

Written by kimberly kilmer | 13/05/2017
Causes of skin discoloration in dogs
Tri-coloured dogs often possess multi-coloured pigmentation. (Bernese dog image by muro from

Skin discolouration in dogs can be as simple as differing natural pigmentation, and as complex as a symptom of disease, parasite infection, or other illness. Some puppies develop different skin pigmentation as they mature. Older dogs experience normal skin colour changes on exposed skin, or on areas that often come into contact with the ground -- such as the leg joints and paw pads.

Natural pigmentation

Causes of skin discoloration in dogs
Skin pigmentation is easy to see in hairless breeds like Chinese Cresteds. (Chinese crested dog puppy playing - big jump image by Gleb Semenjuk from

Most dogs have multi-coloured skin that exhibits many shades of pigmentation. Dogs with coats and skin in shades other than white are considered pigmented. Skin pigments in dogs include purple, dark pink, yellow, black, brown, rust, or red. Dogs with severely darkened natural skin are considered hyper-pigmented. Some individuals of the hairless breeds -- such as the Chinese Crested and Xoloitzcuintle -- exhibit naturally hyper-pigmented skin. Chinese Cresteds vary in coat and skin colour and can also have lighter pigmented skin.


Causes of skin discoloration in dogs
Dudley nose cause discolouration of the nose in some breeds. (nez de chien image by Anthony CALVO from

While many medical or genetic conditions can cause changes in pigmentation, the most common causes are hypothyroidism, Cushing's disease, skin cancers, hormonal imbalances, skin abrasions, irritation caused by parasites, allergies, or infection, and irregularities of the skin follicles. Some breeds are predisposed to skin pigment changes as they age that tend not to be harmful. For example, nasal pigmentation changes -- known as Dudley nose -- cause the nose to fade from black to brown or pink. This discolouration is often noted in Labrador retrievers, golden retrievers, and doberman pinschers.

Noticing pigmentation changes

Causes of skin discoloration in dogs
Frequently examine your dog's skin and note any changes. (A Lhasa Apso dog image by Florussel Sathya from

All told there are more than 38 conditions that can cause changes in canine skin or coat pigmentation. Most need veterinary care to resolve. Know what your dog's skin typically looks like and make note of any changes. While most dogs have skin that exhibits different shades across their body, knowing what is normal and reporting any changes to your veterinarian is wise. An early examination can be key in ruling out skin changes of little medical concern. That same examination can give your veterinarian a baseline in the event discolouration continues or the condition requires immediate treatment.

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